Tube-well



F. H. SMITH.

TUBE WYBLL.

No. 313,893. Patented Mar. 17, 1885.

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PATENT Tric.

FREDERICK H. SMITH, OF KANSAS CITY, MISSOURI.

TUBE- WELL.

SPECIFICATION forming part of Letters Patent No. 313,893, dated March17, 1885.

Application filed November 11, 1884.

To a/ZZ whom it may concern.-

Be it known that I, FREDERICK H. SMITH, of Kansas City, Jackson county,Missouri,have invented certain new and useful Improvements inTube-Vclls, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart hereof.

The object of my invention is to provide tube-wells with such improvedwater-lifting devices as will render their construction and repair morecertain of accomplishment, and their operation comparatively morereliable than heretofore; and it consists in the devices and combinationof devices hereinafter described, and particularly pointed out in theclaims.

In4 the drawings, Figure 1 is a section through the pump-cylinder,sand-shoe, and lower cheek-valve tube; and Fig. 2 is a like view of thecylinder and shoe having the internal parts removed therefrom. Eachfigure is constructed upon a plane with the vertical line x x.

It has been found in practice that, owing to the nature of the groundthrough which the greater number of tube-wells are bored, the cylindercorrodes, so as to be within a short time almost or entirely unt forservice. In order to remedy this defect, I propose to galvanize thecylinder A both internally and `upon its outer surface.

Heretofore much difficulty was had in driving cheek-valves to their seatat the lower eX- tremity of the cylinder or driving-barrel. As there waspractically nothing connected to them that would keep them in a verticalline with the cylinder they would, as it were, attempt to turn end forend therein, and in many cases would come to and be left upon theirbearing in an oblique position. A check-valve under such circumstancescannot fully accomplish the object which rits name implies.

My improved check-tube L is closely encircled near its lower end by anannular ring, F, which has a diameter corresponding to the bore of thecylinder. When the said checktube is being driven to place, thedrill-rod l? is attached to its threaded upper end, d, and the rubberpacking-ring E, encircling the cone L upon the check-tube, and having arect- (No model .l

angular outer surface, guides the upper end, and the ring F holds thelower end in a central position. The said packing-ring E tapers upwardlyfrom its internal surface, a and is eX- panded by thecorrespondingly-tapered cone L. Each is constructed with smoothsurfaces, for reasons explained further on. The checktube L can only bedriven downwardly until the coned surface L comes in contact with abeveled seat, c", flared from thel internal diameter of the ring F atits upper edge, M. Heretofore, owing to the absence of such a seat tolimit its movement, the check-tube has been driven so far within thepacking-ring that the latter would interfere with the perfeet working ofthe valve, and the packingring (usually rectangular y in crosssection)could be compressed until when required its removal would be verydifiicult, if not im- 7o possible.

The smooth surfaces of my. improved cone and the comparatively smallbody of rubber forming the packingring E render the withdrawal of thecheck-tube quite an easy matter. Vhen the check-tube has been fullydriven to place, the lower edge, a, of the packing-ring is in contactwith the upper edge, M, of the ring F. An internally-threaded thimble,K, is attached to thelower extremity of the cheektube, and prevents thesame from being drawn upwardly without carrying with it the ring F. Thislatter is recessed internally at the lower end, f', forming a concentricshoulder, as, which is engaged by the upper edge, a, of the thimble K,as shown. The lower edge, a, of the ring F rests upon the top edge, a,of the sand-point coupling G. This coupling has an external diametercorresponding to the cylinder-bore, and its lower edge rests upon theconcentric shoulder B', projecting within the shoe B. The upper end ofthe sand-point H is screwed within the threaded coupling G, as shown.The `cylinder may be provided at its upper extremity with a coupling, asC. The stem a of the valve D is held in a central position by thebridge-piece b, placed within the check-tube.

It will be noticed that the shoulder B projects at a right angle fromthe interior of the shoe sufficiently far to form a solid bearing forthe lower end of the cylinder or driving- IOO barrel, so that in harddriving, where the barrel hasl to be driven a great depth, the strainwill fall upon the shoulder and not upon the screw-threads of the shoeand the barrel. In addition to this, the said shoulder forms a solidresting-place for the sand-point coupling` G, with which it forms atight joint.

I am aware that in tubular wells the shoe has been formed with a rib orshoulder upon its inner surface, said rib being tapered either way fromits smallest diameter to prevent sand from lodging in its ascent ordescent when sand-pumping, the purpose of such rib being to obviate thedanger of losing different portions of the apparatus. Such aconstruction, however, does not answer my present purpose, for the lowerend of the driving-barrel does not rest upon the described rib, the

strain in driving being all on the threads in the upper end of the shoeand upon the lower end ofthe driving-barrel. Should such threads breakin heavy driving, the end of the drivingbarrel would Strike thedownwardly-inclined surface of the rib and be vthereby turned inward toobstruct the downward passageof the sand-point. I therefore disclaimsuch construotionf What I claim as new, and desire to secure by LettersPatent, is

The combination, in a tube-well, of the pump-cylinder, the check-tubeprovided with a slnoothsurfaced cone near its upper end, thepacking-ring having a Haring inner surface encircling the cone, and thering F, upon the upper edge of which the said cone rests when thecheck-tube is in place, substantially as specified.

In testimony whereof I affix my si gnature in presence of two witnesses.

FREDERICK H. SMITH.

Witnesses:

WM. J. BERKOWITZ, GUs P. MARTY.

